[网络安全设计论文] 舒仲英,隆文非,刘浩吾,李龙国 (四川大学水利水电学院,成都 ,610065)
摘 要:本文结合某重力坝工程,进行了坝体—库水—气幕动力相互作用的振动台模型试验,研究库水对大坝自振频率、坝面动水压力及加速度的影响,以及气幕对坝面动水压力的影响,同时辅以数值计算。结果表明,气幕对坝面动水压力及其动力特性均有影响,坝前气幕的良好压缩性能对地震效应有很大的缓冲作用,从而能极大的降低动水压力和坝体的动应力、改善和提高坝体的抗震性能,有极大的推广运用价值。 关键词:重力坝,气幕隔震,动水压力,振动台,动力模型试验
Study on the Applicability of Air-cushion Technique in High-dam Aseismic Control
SHU Zhong-ying,LONG Wen-fei,LIU Hao-wu,LI Long-guo (School of Water Resource and Hydropower,Sichuan Univ.,Chengdu 610065,China)
Abstract: The author presented a dynamic oscillating table model test results of a gravity dam-reservoir-air cushion system, in which the influence of air-cushion on hydrodynamic pressures upon the dam surface, acceleration, displacement of dam was studied. The results showed that the air cushion could significantly decrease the natural frequencies of dam and the hydrodynamic pressures upon the dam surface. The good compression performance could have obvious cushioning action for earthquake, could largely reduce hydrodynamics and dynamic stress, and could improve and raise aseismic effect, so it has excellent isolation ……
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